I've seen some drops in sales and think that the pending US internet sales tax bill could be partially responsible. Also, I've found some evidence in stats that while I'm still ranking well and getting decent traffic that Google is sending me low quality traffic. Last year my primary sites were converting very well as 30-40% and so far this year conversions have been hovering around 7-10% with the same rankings and regularly published quality content. @kewlchat, what have you been seeing in particular that spawned this question? Are you using analytics and various tags to correlate the drop in sales with some measurable metrics? Would you be up for a chat on Skype where we could compare some stats and try to figure out a solution?
Yes, I was getting some decent sales through squidoo for a bmx post i got ranked at #1 for a while, but the purchases have dropped dramatically versus the click through rate